smith



R. H. SMITH.

Lamp.

No. 96,986- P'atented Nov. 16,1869

I raw, "5442 N.PETERS. PHOTO-LITHOGRAPHER, WASHINGTON, D C.

lldltiirll swag twat pat.

ROLAND H. SMITH, or PITTSBURG, PENNSYLVANIA, as'srcnon 'ro JAM-ES AND,'1. B. A'lTERBURY, or SAME rLAcr,

Letters Patent N0.' 96,9 86', dated N'oftember 16, 1869.

LAMP.

The Schedule referred. to in these Letters Patent and making part of thesure.

To all whom. it may concern;

Be it known that I, ROLAND H. SM[TH,'Of P-itts' burg, in the county ofAllegheny, and State of Pennsylvania, have invented certain new anduseful Improvements in Lamps; and I do hereby declare that thefollowing-is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing, making a part of thisspecification, which drawing represents a perspective view of apedestallamp, partly in section, having my improvements applied to it.

This invention relates to certain novel improvements on glass lamps,which are particularly designed for the burning of hydrocarbon fluids.

' It con"sists-- First, in producing a lamp-bowl, or reservoir, ofglass, or other vitreous substance having a screwthread formed on itspeg, adapted for being screwed into a socket, which may be formed by ametallic sleeve, seen-red to the pedestal or lamp-stanm'or which may beformed in the upper end of a metallic or vitreous lamp-stand, wherebythe reservoir can be safely and quickly secured to its stand, as willbe. hereinafter explained.

Second, in producing a vitreous lamp-bowl 0rfluidreservoir, havinga'screw-thread formed upon the circular collar, or flange, surroundingthe opening in the top of the bowl or reservoir, whereby a metallicburner,

. having a corresponding female thread formed in its collar, can bereadily and securely applied to said 'reservoir, as will be hereinafterexplained.

To enable others skilled, in the art to understand my invention, I willdescribe its construction and 0peratiou.

The lamp-bowl or reservoir 11, shown in' the accompanying drawing, ismade of glass, or other vitreous substance, which possesses thecapability of being blown or cast.

This reservoir b may be made of any suitable shape and capacity adaptedfor the style of lamp for which it is intended.

In the production of this reservoir, the mould in which it is formed ismade with. screw-threads upon those portions of it which produce the pege and collard, so that in the operation of blowing or casting thereservoir, screw-threads are formed upon the external surfaces of thepeg e and collar (1, asrepresented in the d 'awiug.

The screw-thread on the flange d is adapted for receiving acorresponding thread, which is formed on the collar a of the burner c,and thus allowing the collar to be screwed firmly upon 'the reservoir.

The screw-thread upon the peg e is adapted for receiving a correspondingthread, which is formed in a socket, upon the upper end of a pedestal orstand, 1',

which latter may be made of glass, or other vitreous substance, or ofmetal. If. made of glass, a metal sleeve may be secured to its upperend, having a screwthread formed in it, adapted for receiving thescrewt-hreaded peg 6. Or, if made of glass entirely, a screwthrcad maybe moulded upon the inside of a socket, formed in its upper end,by.inserting or screwing in such socket a metallic; screw-plug, whilethe glass is plastic, and removing this plug before the glass cools".

I am aware that, prior to my invention, metallic caps or burners forlamps, have been constructed with .threads upon them, and that metallicreservoirs have been adapted forreceiving such caps.

I amalso aware that, prior to my invention, metallic reservoirs havebeen secured to metallic pedestals or stands, by means ofscrew-connections.

I am also aware that, prior to my invention, glass preserve -jars havebeen made with screw-threads in them, adapted for receiving metalscrew-caps and rings.

Also, that lantern-glasses have been produced with screw-threads upontheir top and bottom ends, adapted for receiving the metallic cap andbase-portions of the lanterns. l

By my invention, I improve-lamps whose fluid-reservoirs are made ofglass, or other vitreous substance, by providing for securing thereservoirs to glass or metallic pedestals, in such manner that theseparts cannot be casually disconnected.

The practice'has been, before my invention, to secure the glassreservoirsto metallic sleeves or sockets, by means of plaster of Paris,moistened with water,

which sleeves were also secured, in a similar manner,

to the upper ends of their pedestals. The metal screwcollar sections aof the lamp-burners were also secured,

by means of plaster of Paris, to'the glass flanges surrounding theopenings in the lamp-bowls.

Now, it is well known that the fluids known as hydrocarbon, which arenow so universally used for illnrnination, are very explosive andinflammable, and that serious accidents frequently occur in the use-oflamps burning such fluids, in consequence of the casual detachment ofthe metal burners from their glass reservoirs, and the detachment of theglass reservoirs from their pedestals. The cement, which has been usedto connect the metallic parts of the lamps to the glass reservoirs, isseriously impaired by the expamsion and contraction of the metallicparts, by the action of the fluids used in the lamps upon it, and bysudden shocks which lamps receive in handling them.

For these and other reasons, lamps having their.

partsconnected together, are seriously objectionable and dangerous. Y

In the manufacture of such lamps, it is necessary to'hold the parts intheir places, after putting themtogether with cement, until the lattersets, or becomes hard, which is attended with great loss of time, andimperfections in the mounting .of the lamps.

By my invention, all of these objections are,ob atcd.

I produce the screw flanges or collars of the -threads upon the pegs andglass reservoirs, at the same time and at the sameoperation of producingthe reservoirs, and by means-0f tools or machinery adapted to thepurpose, the. collars of the burners, and the sleeves of the pedestalsare screw-tapped.

Thus constructed, the parts composing a lamp can be firmly screwedtogether, and will not be liable to casual detachment under anycircumstances.

Another advantage attendingvmy improvement of the circular collar is,that the burner-flame 0 need not be made in two pieces, as in theordinary practice, but the socket a and burner-frame .0 may be made inone piece, because it will not be [necessary to unscrew the frame 0 fromthe socket a to obtain access to the interior of the fluid-reservoir, asthe frame may be at once unscrewed from the neck or flange d of thisreservoirr Having described my invention,

at of the glass'reservoir of a lampv \Vhat I claim as new, and desire tosecure by Letters Patent, is-

1. A lamp which has a fluid-reservoir, of glass, or other vitreoussubstance, connected to its pedestal by means of a screw-thread, formedon the peg of the said reservoir, and a corresponding thread on 'thepedestal or sleeve thereof, substantially as described.

2. A lamp-reservoir, of glass, or other vitreous substance, producedwith a screw-thread upon its peg e, substantially as described; p p

3. A lamp-pedestal, having a screw socket in it, adapted for receivingthe screw-threadedpeg of glass lamp-reservoir, substantially asdescribed.

4;. 'A lamp-reservoir, of glass, or other vitreous substance, producedwith a screw-thread upon the neck or flanged, which surrounds theopening in the reservoir, substantially as described.

:In testimony whereof, I, the said ROLAND H. SMITH, have hereunto set myhand, in presence of- ROLAND H. SMITH.

\Vitne'sses:

\V. BAKEWELL, ALLAN O. BAKEWELL.

